Titanium 4 chloride ticl4

Dichloromethane (DCM, 99.8%, Chem-Supply), tetrabutylammonium perchlorate (TBAP, 99.0%, Fluka), ferrocene (Fc, 98%, Aldrich), titanium diisopropoxide bis(acetylacetonate) (TAA, 75% in isopropanol, Aldrich), ethanol (99.8%, Sigma-Aldrich), TiO₂ paste (18-NRT, Dyesol), titanium IV chloride (TiCl₄, 99.0%, Sigma-Aldrich), tetrahydrofuran (THF, 97%, Ajax), 1,2-dimethyl-3-propylimidazolium iodide (DMPII, synthesized in house), lithium iodide (LiI, 99.9%, Aldrich), I₂ (99.99%, Aldrich), tert-butylpyridine (tBP, 96%, Aldrich), acetonitrile (AN, 99.8%, Sigma-Aldrich), valeronitrile (VN, 99.5%, Sigma-Aldrich), tris(2,2′-bispyridine)cobalt II/III (Co²⁺/Co³⁺, synthesized in house), chenodeoxycholic acid (CDCA, Solaronix), fluorine doped tin oxide glass (FTO glass, 2.2 mm, 7 Ω □^–1, TEC®), glass microscope slides (Sail brand, 1 mm thick).
Por–(Cb-TPA), Cb-TPA and Por were synthesized as described in ref. 10 .

Powder SnSe₂ crystals (Ossila Ltd—Sheffield, UK, CAS 20770-09-6), 1-Methyl-2-pyrrolidinone (NMP), (Sigma-Aldrich, Milano, Italy, CAS 872-50-4), titanium(IV) chloride (TiCl₄) (Sigma-Aldrich, Milano, Italy, CAS 7550-45-0), ethanol (EtOH), (Sigma-Aldrich, Milano, Italy, CAS 64-17-5), Pluronic F-127 (~12,600 g·mol⁻¹, Sigma-Aldrich, Milano, Italy CAS 9003-11-6), stearic acid (Sigma-Aldrich, Milano, Italy, CAS 57-11-4), Rhodamine B (RhB), (Sigma-Aldrich, Milano, Italy, CAS 81-88-9), and deionized water were used as received, without further purification. (100) oriented, P-type/Boron-doped silicon wafers and synthetic fused silica slides (Suprasil^®, Hanau, Germany) were employed as the substrates.